Custom calculators › Swimming pools
Swimming pool heat pump calculators
A customer enters their pool and the tool sizes the heat pump it needs, then picks the unit in your range that meets it. Below is a working example on a brand-neutral product table. The sizing runs the AS 5352:2022 method on the pool's own climate, on our server.
Question 1 of 4
Where is the pool?
How this is calculated
Most online pool calculators multiply the volume by a rule of thumb. This one runs a full heat balance on an engine EnergyAE built and validated for pool work.
The published method
AS 5352:2022 Section 6: evaporation as a wind-driven function of the vapour pressure difference, long-wave radiation to the sky, convection to the air, less absorbed solar. A cover enters as a thermal resistance in series and a cut in evaporation. Capacity is Eq 6.19, heat-up time is Eq 6.20.
Validation against the standard
The engine reproduces every cell of the reference pool heating workbook to thirteen decimal places, and its hourly companion model matches the standard's own published unheated pool temperatures to within 0.62 K (root mean square error) across four cities. The code behind this page is held to the engine by an automated test on every build.
It allows for capacity falling in cold air
A pool heat pump delivers less than its rated (nameplate) capacity as the air cools, and AS 5352 Clause 6.7 says to size it on the coldest air temperature it will run in. Skipping that is what undersizes installations for spring and autumn. This tool applies it, and reports the fraction of rated capacity it used.
What a build for your brand adds
The example above is the monthly sizing path against a generic product table.
Your real model table
Capacity and power at both AS 5352 Table 4.2 rating points for every model, plus modulation range and low-ambient cutout. The selector then returns your part numbers, and the capacity reduction in cold air is fitted to each unit rather than a market-typical line.
The markets you sell into
Nine Australian cities are wired into this example because that is what the standard tabulates. Any market with a typical meteorological year (TMY) weather file can be added, New Zealand included: the sky temperature the method needs can be derived from dew point and cloud cover, both of which a TMY file carries.
The hourly model where it matters
The monthly method holds the pool at setpoint on mean weather. On the same weather our time-marching model reads up to 19 % apart from it on annual energy, and the sign changes with climate. For a capacity claim or a running cost figure a customer will hold you to, that gap is worth closing.
Embed, branding and leads
One line of embed code on your own site in your typography and colours, or a hosted page under your domain. Optional lead capture on the result, delivered to whichever inbox or CRM you use.
Air temperature and the season-start heat-up
A unit delivers its rated capacity at its rating point, and less than that as the air cools, so the rated capacity you need is larger than the heat the pool needs by a factor the example reports on screen.
Then there is the season-start heat-up. Bringing a pool up from its unheated temperature is often a larger load than the steady daily heating, and the example shows which of the two sets the size in each case.
Pool pumps and other pool equipment
Pool heating is the calculation we have built and validated. Pool pumps carry a certificate value under the NSW schemes, and pool covers, sanitisers and controllers all have a running cost argument that can be calculated.
If your range covers more than heating, tell us what the tool should work out and we will scope it with the rest.
Want one for your pool range?
Tell us which markets the tool needs to cover and send your model tables. We will scope a build against them and come back with a fixed quote.
Request a quoteThe calculator above is a demonstration. Figures are estimates from the AS 5352:2022 monthly method on tabulated climate data and a generic product table, and are not a specification, a performance guarantee or a recommendation for a specific installation.